Unfortunately,
the sky was cloudy, so we couldn't see the Northern Lights,
but my monitoring equipment at the Polarlight
Center picked up vibrations in the local magnetic field
(red trace) and ground currents (blue trace) caused by those
magnetic changes. The disturbance in magnetic declination
was about 3 degrees! On my VHF radio aurora system was a
reflection directly upwards from a corona crown. This
was for sure a strong effect from a coronal hole.